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import React, { Component } from 'react'
import { connect } from 'react-redux'
import { toArray } from 'app/utils'
import actions from 'app/actions'
import { Arrow } from '../nav/viewer.icons'
import { EfluxClose } from '../nav/eflux.icons'
class ViewerSectionsFootnotes extends Component {
state = {
scrollPositions: [],
}
constructor(props) {
super(props)
this.scrollRef = React.createRef()
}
componentDidUpdate(prevProps) {
if (this.props.footnoteList !== prevProps.footnoteList) {
this.cacheScrollPositions()
}
if (this.props.currentFootnote !== prevProps.currentFootnote) {
this.scrollToFootnote()
}
}
cacheScrollPositions() {
let scrollPositions = toArray(this.scrollRef.current.querySelectorAll('.note-element')).map(el => {
return el.offsetTop
})
this.setState({ scrollPositions })
}
scrollToFootnote() {
const { currentFootnote } = this.props
const id = currentFootnote.footnote_id - 1
const pos = this.state.scrollPositions[id]
this.scrollRef.current.scrollTo(0, pos - 5)
}
render() {
const { footnoteList } = this.props
return (
<div className='nav-footnotes'>
<div className='nav-footnotes-close' onClick={() => actions.viewer.hideNavComponent('footnotes')}>
{EfluxClose}
</div>
<div className='nav-footnotes-scroll' ref={this.scrollRef}>
{footnoteList.map(note => (
<div key={note.footnote_id} className="note-element">
<div className="note-number">
{note.footnote_id}
</div>
<div className="note-body">
<div dangerouslySetInnerHTML={{ __html: note.text }} />
<u onClick={() => actions.viewer.seekToTimestamp(note.start_ts)}>
{'Go to text'}
</u>
</div>
</div>
))}
</div>
<div className='nav-footnotes-gradient' />
<FootnotesLink type='down' />
</div>
)
}
}
const FootnotesLink = ({ type }) => (
<div className="nav-return" onClick={() => actions.viewer.hideNavComponent('footnotes')}>
<Arrow type={type} />
{'Notes'}
</div>
)
const mapStateToProps = state => ({
footnoteList: state.viewer.footnoteList,
currentFootnote: state.viewer.currentFootnote,
})
export default connect(mapStateToProps)(ViewerSectionsFootnotes)
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